铁磁质在磁场中所受磁场力的数学模型  

Mathematical Model of Magnetic Forces in Ferromagnetic Materials under Magnetization

作　　者：顾晓安[1] 沈荣瀛[1] 许庆新[1] 徐基泰 

机构地区：[1]上海交通大学振动,冲击,噪声国家重点实验室,上海200030 [2]西安变压器厂,西安710077

出　　处：《上海交通大学学报》2003年第5期794-797,共4页Journal of Shanghai Jiaotong University

摘　　要：介绍了电磁场理论中基于虚功原理导出的磁场力的一般数学表达式以及从不同角度描述铁磁质磁致伸缩现象的几种方法 .引入弹性力学理论中的应变能密度概念 ,从能量守恒和功能转换的角度描述了表征磁致伸缩现象的磁场力 .进而给出了磁准静态场和正弦交变电磁场条件下铁磁质所受磁场力的数学模型 .The general mathematical expression of magnetic forces were presented according to the theory of electromagnetic fields. Then, based on physical property (magnetostriction) of ferromagnetic materials of electric machines, the conception of density of strain energy, quoted from the theory of plastoelasticity, was introduced to describe the magnetic forces of magnetostriction phenomenon. At the end, four kinds of mathematical model, under different types of magnetization, were established. The proposed models can be used to analyze the vibration and noise of magnetic circuit of large power equipments.

关 键 词：磁场力 磁致伸缩 数学模型 

分 类 号：TB535[理学—物理]